Oman, Southern Coast, Unidentified flora

This is one of a series of photographs from an island off the southern coast of Oman. I am trying to ID some of the native flora, however I am finding that there are very few resources available on the internet. If you happen to come across this post and have any knowledge pertaining to plants of the Arabian peninsula, or know of resources, I would be very interested in any info. See the “Oman” category for more photos from this region.